Example plugin.xml file

The following is a sample of a plugin.xml file. This file adds support for a new set
of specialized DTDs, and includes an override for the XHTML output processor.

This plugin.xml file would go into a directory such as
DITA-OT/plugins/music/ and referenced supporting files would also exist in that
directory. A more extensive sample using these values is available in the actual music plug-in, available on
SourceForge.